<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<script src="./vue.js"> </script>
<script src="./ele.js"></script>
<link rel="stylesheet" href="./element.css">

<body>
    <div id="app">
        <el-upload class="avatar-uploader" action="https://jsonplaceholder.typicode.com/posts/" :show-file-list="false"
            :on-success="handleAvatarSuccess" :before-upload="beforeAvatarUpload">
            <img v-if="imageUrl" :src="imageUrl" class="avatar">
            <i v-else class="el-icon-plus avatar-uploader-icon"></i>
        </el-upload>
    </div>

    <script>

        new Vue({
            el:"#app",
            data: {
                imageUrl: ''
            },
            methods: {
                handleAvatarSuccess(res, file) {
                    this.imageUrl = URL.createObjectURL(file.raw);
                },
                beforeAvatarUpload(file) {
                    const isJPG = file.type === 'image/jpeg';
                    const isLt2M = file.size / 1024 / 1024 < 2;

                    if (!isJPG) {
                        this.$message.error('上传头像图片只能是 JPG 格式!');
                    }
                    if (!isLt2M) {
                        this.$message.error('上传头像图片大小不能超过 2MB!');
                    }
                    return isJPG && isLt2M;
                }
            }
        })


    </script>
</body>


<style>
    .avatar-uploader .el-upload {
        border: 1px dashed #d9d9d9;
        border-radius: 6px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
    }

    .avatar-uploader .el-upload:hover {
        border-color: #409EFF;
    }

    .avatar-uploader-icon {
        font-size: 28px;
        color: #8c939d;
        width: 178px;
        height: 178px;
        line-height: 178px;
        text-align: center;
    }

    .avatar {
        width: 178px;
        height: 178px;
        display: block;
    }
</style>

</html>